Help Calculating Cubic Meters of Timber Required For Project

I need some help with my maths. I doubt the validity of any calculations I do.

I will need the following pieces of oak at:

0.05 meters x 0.05 meters x 0.6 meters = 0.0015 cubic meters
0.025 meters x 0.025 meters x 0.4 meters = 0.00025 cubic meters
0.05 meters x 0.3 meters x 0.3 meters = 0.0045 cubic meters

I will need:

50 pieces of the 0.05 meters x 0.05 meters x 0.6 meters = 0.0015 cubic meters totalling 0.08 cubic meters
600 pieces of the 0.025 meters x 0.025 meters x 0.4 meters = 0.00025 cubic meters totalling 0.15 cubic meters
25 pieces of the 0.05 meters x 0.3 meters x 0.3 meters = 0.0045 cubic meters totalling 0.11 cubic meters

Making for a grand total of 0.08 + 0.15 + 0.11 = 0.34 cubic meters.

Is this correct? I only need 0.34 cubic meters for this project?